Trait caffe2_imports::Sub

1.0.0 · source ·

pub trait Sub<Rhs = Self> {
    type Output;

    // Required method
    fn sub(self, rhs: Rhs) -> Self::Output;
}

Expand description

The subtraction operator -.

Note that Rhs is Self by default, but this is not mandatory. For example, std::time::SystemTime implements Sub<Duration>, which permits operations of the form SystemTime = SystemTime - Duration.

Examples

`Sub`tractable points

use std::ops::Sub;

#[derive(Debug, Copy, Clone, PartialEq)]
struct Point {
    x: i32,
    y: i32,
}

impl Sub for Point {
    type Output = Self;

    fn sub(self, other: Self) -> Self::Output {
        Self {
            x: self.x - other.x,
            y: self.y - other.y,
        }
    }
}

assert_eq!(Point { x: 3, y: 3 } - Point { x: 2, y: 3 },
           Point { x: 1, y: 0 });

Implementing `Sub` with generics

Here is an example of the same Point struct implementing the Sub trait using generics.

use std::ops::Sub;

#[derive(Debug, PartialEq)]
struct Point<T> {
    x: T,
    y: T,
}

// Notice that the implementation uses the associated type `Output`.
impl<T: Sub<Output = T>> Sub for Point<T> {
    type Output = Self;

    fn sub(self, other: Self) -> Self::Output {
        Point {
            x: self.x - other.x,
            y: self.y - other.y,
        }
    }
}

assert_eq!(Point { x: 2, y: 3 } - Point { x: 1, y: 0 },
           Point { x: 1, y: 3 });

type Output = Matrix<T, <ShapeConstraint as SameNumberOfRows<R1, R2>>::Representative, <ShapeConstraint as SameNumberOfColumns<C1, C2>>::Representative, <DefaultAllocator as Allocator<T, <ShapeConstraint as SameNumberOfRows<R1, R2>>::Representative, <ShapeConstraint as SameNumberOfColumns<C1, C2>>::Representative>>::Buffer>

source §

Required Methods§

fn sub(self, rhs: Rhs) -> Self::Output

Implementors§

impl Sub<&f32> for &f32

type Output = <f32 as Sub<f32>>::Output

impl Sub<&f32> for f32

type Output = <f32 as Sub<f32>>::Output

impl Sub<&f64> for &f64

type Output = <f64 as Sub<f64>>::Output

impl Sub<&f64> for f64

type Output = <f64 as Sub<f64>>::Output

impl Sub<&i8> for &i8

type Output = <i8 as Sub<i8>>::Output

impl Sub<&i8> for i8

type Output = <i8 as Sub<i8>>::Output

impl Sub<&i16> for &i16

type Output = <i16 as Sub<i16>>::Output

impl Sub<&i16> for i16

type Output = <i16 as Sub<i16>>::Output

impl Sub<&i32> for &i32

type Output = <i32 as Sub<i32>>::Output

impl Sub<&i32> for i32

type Output = <i32 as Sub<i32>>::Output

impl Sub<&i64> for &i64

type Output = <i64 as Sub<i64>>::Output

impl Sub<&i64> for i64

type Output = <i64 as Sub<i64>>::Output

impl Sub<&i128> for &i128

type Output = <i128 as Sub<i128>>::Output

impl Sub<&i128> for i128

type Output = <i128 as Sub<i128>>::Output

impl Sub<&isize> for &isize

type Output = <isize as Sub<isize>>::Output

impl Sub<&isize> for isize

type Output = <isize as Sub<isize>>::Output

impl Sub<&u8> for &u8

type Output = <u8 as Sub<u8>>::Output

impl Sub<&u8> for u8

type Output = <u8 as Sub<u8>>::Output

impl Sub<&u16> for &u16

type Output = <u16 as Sub<u16>>::Output

impl Sub<&u16> for u16

type Output = <u16 as Sub<u16>>::Output

impl Sub<&u32> for &u32

type Output = <u32 as Sub<u32>>::Output

impl Sub<&u32> for u32

type Output = <u32 as Sub<u32>>::Output

impl Sub<&u64> for &u64

type Output = <u64 as Sub<u64>>::Output

impl Sub<&u64> for u64

type Output = <u64 as Sub<u64>>::Output

impl Sub<&u128> for &u128

type Output = <u128 as Sub<u128>>::Output

impl Sub<&u128> for u128

type Output = <u128 as Sub<u128>>::Output

impl Sub<&usize> for &usize

type Output = <usize as Sub<usize>>::Output

impl Sub<&usize> for usize

type Output = <usize as Sub<usize>>::Output

impl Sub<&Saturating<i8>> for &Saturating<i8>

type Output = <Saturating<i8> as Sub<Saturating<i8>>>::Output

impl Sub<&Saturating<i8>> for Saturating<i8>

type Output = <Saturating<i8> as Sub<Saturating<i8>>>::Output

impl Sub<&Saturating<i16>> for &Saturating<i16>

type Output = <Saturating<i16> as Sub<Saturating<i16>>>::Output

impl Sub<&Saturating<i16>> for Saturating<i16>

type Output = <Saturating<i16> as Sub<Saturating<i16>>>::Output

impl Sub<&Saturating<i32>> for &Saturating<i32>

type Output = <Saturating<i32> as Sub<Saturating<i32>>>::Output

impl Sub<&Saturating<i32>> for Saturating<i32>

type Output = <Saturating<i32> as Sub<Saturating<i32>>>::Output

impl Sub<&Saturating<i64>> for &Saturating<i64>

type Output = <Saturating<i64> as Sub<Saturating<i64>>>::Output

impl Sub<&Saturating<i64>> for Saturating<i64>

type Output = <Saturating<i64> as Sub<Saturating<i64>>>::Output

impl Sub<&Saturating<i128>> for &Saturating<i128>

type Output = <Saturating<i128> as Sub<Saturating<i128>>>::Output